What Is a USDOT Number?
A USDOT (United States Department of Transportation) number is a unique identifier assigned to commercial motor carriers operating in the United States. It is issued by the Federal Motor Carrier Safety Administration (FMCSA) and is used to track a carrier's safety record, inspections, compliance reviews, crash data, and insurance.
A Canadian carrier operating a covered self-propelled commercial motor vehicle in the US should confirm its USDOT registration and the vehicle marking rule for that operation. See the text of 49 CFR 390.21.
MC Number Requirements
FMCSA operating authority is a separate question from vehicle marking. Whether a carrier needs authority depends on its service and cargo; check FMCSA's operating-authority guidance. An MC number is not a required exterior vehicle marking under 49 CFR 390.21.
- Registration: Confirm whether operating authority applies to the work your carrier performs.
- Vehicle marking: The carrier name and USDOT number are the required items listed in 49 CFR 390.21(b); MC display is not required by that marking rule.
USDOT Number Decals for Canadian Carriers
See current sizes, wording options and price on the product page.
View USDOT decalsWho Needs DOT Compliance?
These are common federal registration thresholds for interstate operations. Verify your vehicle and service with FMCSA's USDOT eligibility guidance:
- Vehicles with a GVWR of 10,001 lbs (4,536 kg) or more
- Vehicles designed to transport 9+ passengers (including the driver) for compensation
- Vehicles designed to transport 16+ passengers (including the driver) regardless of compensation
- Any vehicle transporting hazardous materials requiring placards
Vehicle Marking Requirements — 49 CFR 390.21
For covered self-propelled commercial motor vehicles, 49 CFR 390.21(b)–(d) specifies the carrier name and USDOT marking and how it must be displayed:
Use the Correct Marking Rule
Check a vehicle-marking question against 49 CFR 390.21. Section 395.8 concerns the driver's record of duty status; it is not the citation for a missing USDOT number. Registration, operating authority, insurance and driver records are separate requirements. Ask the inspecting agency for the exact citation and facts rather than using a generic violation-code list.
Fleet Compliance & Audits
FMCSA oversight can cover more than vehicle lettering. Confirm the requirements for your operating authority, cargo and vehicles with FMCSA registration guidance. Prepare the records that apply to your operation, including:
- Vehicle marking: Carrier name and USDOT number on covered self-propelled vehicles under 49 CFR 390.21
- Driver qualification files: CDL, medical certificates, driving records
- Hours of service: ELD compliance, daily logs, exemptions
- Vehicle maintenance: Inspection records, DVIR (Driver Vehicle Inspection Reports)
- Insurance and authority: Check FMCSA's current filing chart; amounts differ by authority, cargo and vehicle.
- Driver and safety programs: Verify the programs that apply to your carrier and drivers.
How to Check Registration and Operating Authority
Check the current FMCSA registration system
FMCSA now directs new and existing registrants to Motus. Review its current status and notices before submitting an application.
Confirm which authority applies
Use FMCSA guidance to determine whether your work requires USDOT registration, operating authority, or both.
Check filing and insurance requirements
Operating-authority, process-agent and insurance filings depend on the service and cargo. Verify the current requirements and fees with FMCSA.
Mark covered vehicles
Under 49 CFR 390.21, display the operating carrier name and USDOT number on both sides with the required contrast and legibility. MC display is not required by this marking rule.
See FMCSA's Motus guide and its current biennial-update notice for the latest status.
Canadian vs. US Marking Requirements
Ontario's CVOR certificate-carry rule and the US exterior marking rule are different. Check each against the vehicle and operation:
| Requirement | Canada (Ontario) | United States |
|---|---|---|
| Carrier document / number | Driver carries the CVOR certificate or qualifying lease under HTA s.16(3); exterior CVOR number display is not the rule | Display the USDOT number preceded by “USDOT” under 49 CFR 390.21 |
| Name | Owner name clearly visible on both sides under HTA s.103(1), subject to applicable exceptions | Operating carrier's legal or single trade name on both sides under 49 CFR 390.21 |
| Letter size | No fixed Ontario CVOR exterior-number height in the cited carry rule | Sharp contrast and daylight legibility from 50 feet; no universal 2-inch minimum in 49 CFR 390.21 |
| Removable marking | Check the applicable owner-name rule and the chosen material's suitability | Permitted when it meets the identification and legibility requirements; not limited to leased vehicles |
| MC / GVW | Any exterior fleet reference does not replace the CVOR certificate-carry rule; check other marking rules separately | MC number and GVW are not required exterior items under 49 CFR 390.21 |
Check Your USDOT Marking Options
Choose the configuration that matches your carrier records. See current product options and price before checkout.
View USDOT productEnforcement Questions
A marking, registration, authority or insurance issue must be evaluated under its own rule and the facts of the inspection. This guide does not assign a fixed fine, out-of-service result or insurance consequence to a missing marking. Ask the inspecting agency for the exact citation and check current FMCSA registration guidance and the marking rule.
Cross-Border Compliance Checklist
- Check current USDOT registration status in FMCSA Motus and read current FMCSA notices
- Confirm whether separate operating authority applies to your service
- Covered vehicle shows the operating carrier name and USDOT number on both sides, with sharp contrast and daylight legibility from 50 feet
- For Ontario operations, driver carries the CVOR certificate or qualifying lease where required
- Check any operating-authority and insurance filings that apply to your carrier
- Review FMCSA Motus and current biennial-update notices before acting on a due date
- Check driver-record and ELD requirements for this operation
Related Cross-Border & Trucking Guides
Choose Your USDOT Markings
Compare the available USDOT decal sizes, wording and materials with your carrier records before ordering. Check current price and delivery at checkout.